Bergh



(ModeL) I H. VAN HOEVENBERGH.

Telegraphic Relay Apparatus.

No. 235,472. Patented Dec. 14,1880.

UNITED STATES PATENT OEEIcE.

HENRY VAN HOEVENBERGH, OF ELIZABETH, NEIV JERSEY, ASSIGNOR TO THE AMERICAN UNION TELEGRAPH COMPANY, OF NEW YORK, N. Y.

TELEGRAPH RELAY APPARATUS.

SPECIFICATION forming part of Letters Patent No. 235,472, dated December 14;, 1880.

Application filed September 1, 1880. (ModeL) To all whom it may concern:

Be it known that I, HENRY VAN HOEVEN- BERGH, of Elizabeth, in the county of Union and State of New Jersey, have invented an l mproved Telegraph RelayApparatus, of which the following is a specification.

Figure 1 is a top view, and Fig. 2 a vertical section of my improved relay apparatus.

This invention has for its object to modify and regulate the power of an electi'o magnet upon an armature without interference with the power of an electric current; and it consists in constructing the electro-magnet with movable spools or cores, which can be brought closer together or moved farther apart at their pole ends for the, purpose of varying their effect upon the armature.

In an application for a patent filed at the same time with this I have described an instrument for obtaining substantially the same effect by the use of the movable shuntingbar applied to the poles of the spools. In the present invention I dispense with the said bar and use simply movable cores or spools for the purpose of bringing the poles nearer together when desired, an d weakening thereby the magnetic effect upon the armature.

In the accompanying drawings, the letters A and B are the two spools of an electro-magnet. These spools or their cores are pivoted together at a, and are movable on their said pivot, so that the pole ends I) c of the cores may be brought at any suitable distance from each other.

D is the armature to be affected by magnetism at the pole ends. If the pole ends are far apart the magnetic effect upon the armature will be greater than if they are brought closer together, as part of the magnetic current will in the latter case circulate through the electromagnet and not be effective at the poles.

I have shown arightand-left threaded screw, E, applied to swivel-posts cl (1, that are placed into the cores of the electro-magnet, as shown, and which are of non-magnetic material, for the purpose of regulating the position of the two spools or their cores; but the same may be regulated by any other means, and I desire it to be ttlidetstOOd, first, that it is not necessary to move both cores or spools, as the result may be obtained if only one is movable in manner stated-that is to say, to bring its pole nearer to or farther from the other pole; nor is it necessary that the spools or their cores have a curved form, as shown. It is moreover not necessary to pivot the spools or their cores directly together, as at a, as they or either one of them may be pivoted to the usual connecting-bar with substantially the same effect.

I claim 1. In a relay apparatus, the electro-magnet A B, made with one of its spoolcores movable toward the pole of the other spool for the purpose of short-circuiting or more or less closing the magnetic circuit, substantially as described.

2. The combination of the spools A B, whose cores are pivoted together with the armature D, and with mechanism for regulating the distance between the poles of the spools opposite to the end where the said spools are connected, substantially as described.

HENRY VAN HOEVENBERGH.

Witnesses HARRY M. TURK, WILEY G. E. SCHULTZ. 

